Typically it takes about 15 minutes for DNS changes to take effect. However, it can occasionally take longer for a change you've made to update across the Internet's DNS system. If you're having trouble with mail flow or other issues after adding DNS records, see Troubleshoot issues after changing your domain name or DNS records.

Add a TXT record for verification

Before you use your domain with Office 365, we have to make sure that you own it. Your ability to log in to your account at your domain registrar and create the DNS record proves to Office 365 that you own the domain.

Note

This record is used only to verify that you own your domain; it doesn't affect anything else. You can delete it later, if you like.

To get started, go to your domains page in Strato.com by using this link. You'll be prompted to log in.

Select Domains.

Select Domain management.

On the Domain management page, next to the domain you want to manage, select manage.

Under Settings (domain), expand DNS Settings.

Next to TXT records, including SPF and DKIM settings, select manage

In the boxes for the new record, type or copy and paste the following values.

Prefix

Type

Value

(leave blank)

TXT

MS=msXXXXXXX Note: This is an example. Use your specific Destination or Points to Address value here, from the table in Office 365. How do I find this?

Select Accept settings.

Wait a few minutes before you continue, so that the record you just created can update across the Internet.

Now that you've added the record at your domain registrar's site, you'll go back to Office 365 and request Office 365 to look for the record.

Typically it takes about 15 minutes for DNS changes to take effect. However, it can occasionally take longer for a change you've made to update across the Internet's DNS system. If you're having trouble with mail flow or other issues after adding DNS records, see Troubleshoot issues after changing your domain name or DNS records.

Add an MX record so email for your domain will come to Office 365

To get started, go to your domains page in Strato.com by using this link. You'll be prompted to log in.

Select Domains.

Select Domain management.

On the Domain management page, next to the domain you want to manage, select manage.

Under Settings (domain), expand DNS Settings.

Next to MX record, choose manage

Next to Primary mail server, choose Personal mail server. In the Address 1 box for the primary mail server, type or copy and paste the value from the following table.

<domain-key>.mail.protection.outlook.com. Note: Get your <domain-key> from your Office 365 portal account. How do I find this?

Select Accept settings to save the record.

Add the CNAME records that are required for Office 365

You'll create the required CNAME records by creating the six subdomains first, and then updating each subdomain with its correct CNAME value.

To get started, go to your domains page in Strato.com by using this link. You'll be prompted to log in.

Select Domains.

Select Domain management.

On the Domain management page, next to the domain you want to manage, select manage.

In this step, you'll create the six subdomains listed in the Subdomain (Host name) table below. Later in, step 7, you'll update each subdomain with its correct CNAME value.

Under Settings (domain), expand Create sub-domain.

In the Name of the sub-domain box, type the first subdomain name from the Subdomain (Host name) table below. Then select Create sub-domain.

Repeat this step for each subdomain in the following table.

Subdomain (Host name)

autodiscover

sip

lyncdiscover

msoid

enterpriseregistration

enterpriseenrollment

Select To the overview.

Now you'll update each subdomain with its CNAME value.

Select the + icon next to your domain to expand the subdomain list.

Next to a subdomain, select manage.

Expand DNS management.

Next to CNAME record, select manage.

Select Change CNAME entry, and then enter the corresponding CNAME value from the table below. You must include a period at the end of the value.

Subdomain (Host name)

Type

Value (Points to address or value)

autodiscover

CNAME

autodiscover.outlook.com.

sip

CNAME

sipdir.online.lync.com.

lyncdiscover

CNAME

webdir.online.lync.com.

msoid

CNAME

clientconfig.microsoftonline-p.net.

enterpriseregistration

CNAME

enterpriseregistration.windows.net.

enterpriseenrollment

CNAME

enterpriseenrollment.manage.microsoft.com.

Select the I am aware… checkbox, and then select Accept settings.

Select To the overview

Select To the overview again.

Select the + icon next to your domain to expand the subdomain list, and then repeat this entire step for each subdomain in the list.

Add a TXT record for SPF to help prevent email spam

Important

You cannot have more than one TXT record for SPF for a domain. If your domain has more than one SPF record, you'll get email errors, as well as delivery and spam classification issues. If you already have an SPF record for your domain, don't create a new one for Office 365. Instead, add the required Office 365 values to the current record so that you have a single SPF record that includes both sets of values.

To get started, go to your domains page in Strato.com by using this link. You'll be prompted to log in.

Select Domains.

Select Domain management.

On the Domain management page, next to the domain you want to manage, select manage.

Under Settings (domain), expand DNS Settings.

Next to TXT records, including SPF and DKIM settings, choose manage.

In the boxes for the TXT record, type or copy and paste the values from the following table.

Note

If records already exist, select the + button to add a new TXT record.

Prefix

Type

Value

(leave blank)

TXT

v=spf1 include:spf.protection.outlook.com -all Note: We recommend copying and pasting this entry, so that all of the spacing stays correct.

Select Accept settings to save the record.

Add the two SRV records that are required for Office 365

To get started, go to your domains page in Strato.com by using this link. You'll be prompted to log in.

Select Domains.

Select Domain management.

On the Domain management page, next to the domain you want to manage, select manage.

Under Settings (domain), expand DNS Settings.

Next to SRV record, choose manage.

Next to SRV record, select Enabled, and then in the boxes for the new record, type or copy and paste the values from the following table.

Service

Protocol

Record type

Priority

Weight

Port

Target

sip

tls

SRV (Service)

100

1

443

sipdir.online.lync.com.

sipfederationtls

tcp﻿

SRV (Service)

100

1

5061

sipfed.online.lync.com.

Select the + icon to add a new line for the second SRV record. Type or copy and paste the values from the table above for the second record.

Select Accept settings to save the records.

Note

Typically it takes about 15 minutes for DNS changes to take effect. However, it can occasionally take longer for a change you've made to update across the Internet's DNS system. If you're having trouble with mail flow or other issues after adding DNS records, see Troubleshoot issues after changing your domain name or DNS records.

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